Effects of gamma radiation on solid trisodium citrate dihydrate: radical kinetics, radiosensitivity and dosimetry

Tuner, Hasan; Korkmaz, Mustafa

doi:10.1007/s00411-010-0304-2

Cited by 8 publications

(3 citation statements)

References 12 publications

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“…2, reaction 2). Furthermore, the oxidation of citrate to dicarboxy acetone, acetone or other products upon heating or in the presence of metal ions has been described in the literature (Jiang et al 2009;Bartosewicz et al 2018;Khan et al 2012;Yasmin et al 2016;Tuner et al 2010). This occurs when citrate ions are decomposed through the microwave irradiation to form dicarboxy acetone (Fig.…”

Section: Resultsmentioning

confidence: 99%

Using microwave irradiation to catalyze the in-situ manufacturing of silver nanoparticles on cotton fabric for antibacterial and UV-protective application

Barani

Mahltig

2020

Cellulose

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Antibacterial and UV-protective cotton fabrics were produced with an in-situ synthesis of silver nanoparticles using trisodium citrate as reductive agent and microwave irradiation for starting the synthesis reaction. The creation of silver nanoparticles with different morphologies such as quasi-spherical and cubic nanoparticles was confirmed by the SEM images. The EDS pattern of the loaded sample confirmed the uniform silver loading on the surface of cotton fibers as well as their crystal structure was approved by the X-ray diffraction pattern. Increasing reaction temperature (80, 100, 120, and 140°C) caused a significant decrease up to 75% in the average diameter of nanoparticles and narrowing the size distribution. Also, increasing amounts of trisodium citrate (0, 100, 200, and 400 ppm) in the synthesizing solution resulted in a decrease up to of 59% in the average diameter and prevented agglomeration of nanoparticles. The FTIR spectra confirmed that the highest absorbed water in the loaded cotton samples was achieved in the highest concentration of trisodium citrate. The antibacterial properties of loaded cotton samples significantly depended on the reaction temperature as well as trisodium citrate concentration. The loaded cotton fabrics showed active antibacterial properties with inhibition zones of 16-18.5 mm against the Gram-positive Staphylococcus aureus and the Gram-negative Escherichia coli. Moreover, the prepared AgNP cotton fabrics demonstrated excellent UV-rays blocking properties with a high rate of ultraviolet protection factor value.

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Section: Resultsmentioning

confidence: 99%

Using microwave irradiation to catalyze the in-situ manufacturing of silver nanoparticles on cotton fabric for antibacterial and UV-protective application

Barani

Mahltig

2020

Cellulose

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“…While, radiosensitivity and kinetic features of sodium salt of CA were studied in detail in the literature [18], in our knowledge no attempt has been made to determine the kinetic features of the produced radicals, radiosensitivity and possible dosimetric potential of CA. The aim of the present work is to investigate the kinetic features of the radicals produced in c-irradiated anhydrous and monohydrate CA, and to explore the radiosensitivity and possible dosimetric potential of these compounds through a detail ESR study carried out at different temperatures.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Kinetic and Dosimetric Features of Citric Acid Using ESR Spectroscopy

Tuner

2012

Appl Magn Reson

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In the present work, dosimetric potential and temperature-dependent behaviors of the radicals produced upon c-irradiation of anhydrous and monohydrate citric acid were explored through a detail electron spin resonance (ESR) study. While unirradiated samples presented no ESR signal, irradiated samples were observed to exhibit an ESR spectrum consisting of many intense and weak resonance lines spread over a magnetic field range about 13 mT and centered at g = 2.0032. Although, the radicals produced upon c-irradiation have the same structures, the ESR spectra of both compounds of citric acid were observed to be different. An evaluation technique based on the variations of the characteristic resonance lines and the spectrum area was adopted to assign the radical species responsible for the observed experimental ESR spectrum and to determine their kinetic and dosimetric features.

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“…This is especially important for low energies, in which the photoelectric effect is predominant (Johns and Cunningham, 1983). Out of the 16 compounds studied, only three of them -lithium carbonate (Popoca and Ureña-Núñez, 2009;Herrera, Ureña-Núñez and Loya, 2005), sodium carbonate (Ureña-Núñez and Ballesteros, 2009), and sodium citrate (Tuner and Korkmaz, 2010) -have already been described with gamma radiation for EMR dosimetry. Considering the behavior of dithionates (Lund et al, 2005), sodium dithionite was selected.…”

Section: Lithium Potassium and Sodium Compoundsmentioning

confidence: 99%

Campos pequenos de radiação e materiais alternativos em dosimetria com espectroscopia de ressonância magnética eletrônica

Rech¹

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Rech AB. Small radiation field and alternative materials in dosimetry with electron magnetic resonance spectroscopy [thesis]. Ribeirão Preto: Universidade de São Paulo, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto; 2017.To keep up with advances in radiotherapy, dosimetric systems need improvement to meet the standards established for treatment accuracy; simultaneously, radioactive exposure goes beyond clinical use, and the detection in unforeseen scenarios is of interest too. Electron magnetic resonance spectroscopy (EMR) can detect paramagnetic centers created in materials exposed to radiation, relating spectral response with absorbed dose, thus performing nondestructively dosimetry, by keeping the information after the readout. After standardization of alanine as a high dose detector and the applicability in clinical studies, difficulties allowed the investigation of other EMR dosimetry materials; on the other hand, classifying compounds that are present daily and with the possibility of tissue equivalence is another stimulus for the expansion of alternative materials analysis. The development of this thesis is between two distinct but interconnected topics; first minidosimeters are presented for small field dosimetry, with a clinical approach, and the investigation of alternative materials, both topics applied in EMR dosimetry. Concerning the minidosimeters, some pellets' aspects are studied, a new concept of detector, called EPResize®; and a stereotactic radiosurgery end-to-end audit are presented; about alternative materials research, more than 20 compounds were studied, based on ammonium, lithium, potassium and sodium. The results showed that the difficulties in determining the dose with small fields in a clinical dose range is an issue that still needs much attention and adequacy of the dosimetric systems, in order to extract the greatest possible sensitivity, with the need to employ parameters and methods of analysis besides the daily used; several materials were adequate for EMR dosimetry, such as ammonium sulfate, sodium formate, sodium dithionate, sodium citrate and different sulfites, which, even when not satisfying clinical aspects, are alternatives for control and determination of doses in other scenarios. The ability to perform clinical dosimetry with RME and the standardization of this system allow the improvement of treatments accuracy, and the availability of a greater variety of EMR dosimetry materials facilitates the need for dose mapping unforeseen cases.

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Effects of gamma radiation on solid trisodium citrate dihydrate: radical kinetics, radiosensitivity and dosimetry

Cited by 8 publications

References 12 publications

Using microwave irradiation to catalyze the in-situ manufacturing of silver nanoparticles on cotton fabric for antibacterial and UV-protective application

Using microwave irradiation to catalyze the in-situ manufacturing of silver nanoparticles on cotton fabric for antibacterial and UV-protective application

Investigation of Kinetic and Dosimetric Features of Citric Acid Using ESR Spectroscopy

Campos pequenos de radiação e materiais alternativos em dosimetria com espectroscopia de ressonância magnética eletrônica

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